MTB Project Logo

Thunder Monkey

 11 votes

15.6 Miles 25.1 Kilometers



1,170' 357 m


-3,864' -1,178 m


6,765' 2,062 m


3,458' 1,054 m



Avg Grade (3°)


Max Grade (14°)



Beautiful alpine ride through some legit MTB country.

Tyler Zundel


The top of this one is on Bogus Basin so ski season will take priority when the snow flies.
Connect the Shafer Butte system with Mahalo and Dry Creek. Unless you're interested in riding back to the ski area on Bogus Basin road after the descent, you'll want to do a shuttle.

This ride has everything - climbs, breathtaking descents, wood and stone features, and some excellent backcountry singletrack.

Need to Know

This is a shuttle ride unless you're into pedaling up 14 miles of pavement after the fun part.


You'll start at the Simplot lodge at Bogus Basin (after leaving a car at the bottom of Dry Creek). The objective is to get to the intersection of Deer Point Trail and Around the Mountain. This map goes right up Deer Point Trail. Another option would be to take Morningstar Trail up to Brewer's Byway, then drop down the top half of Deer Point Trail to the Around the Mountain intersection - either way, take the Around the Mountain trail south (counter clockwise). Travel along this trail for about 1.5 miles until you reach the 2nd of two road crossings (these are bike gated crossings that you won't miss).

On the 2nd crossing, take the road to the south instead of continuing on ATM. You'll be on the road for about 5 minutes when you come to a fork. Take the left fork onto FR 275C. Follow this road until you reach a full gate across the road. Navigate around teh gate and continue down the road to the Mahalo trailhead. This distance is only a couple hundred yards and the trailhead will be on your right - watch closely as it's somewhat hidden. Once you do find Mahalo trailhead, you'll now have 3.3 miles of awesome, legit singletrack to play on. A modest climb out at the end drops you onto the same road you took when you were on Around the Mountain earlier. Go left (south) on the road for approximately 1 mile until you arrive at the unmarked, but well used Dry Creek trailhead - this will be on the right.

Take this trail and hold on to your biscuits because stuff just got real. Over 12 creek crossings and all kinds of excellent terrain await you as you move down the Dry Creek trail. If you survive, you'll arrive at the mouth of the trail to your waiting shuttle rig.


Land Manager: Ridges to Rivers

Rate Featured Ride

   Clear Rating

5.0 from 11 votes

Get On-Trail Navigation

Send to Phone
Your Check-Ins


Jul 9, 2017
Chris M
Jun 8, 2017
Doug Douglass
Oct 2, 2016
jeremiah grizzy
Aug 31, 2016
George Aston
Aug 10, 2016
Matt Stutz
Jul 27, 2016
Jeremy stoddart
Bring a light if you start late. Lower dry creek is sketchy after dark. 17.1mi — 2h 15m
Jul 3, 2016
Gordy Shields
Jun 13, 2016
Richard Croad

Trail Ratings

  5.0 from 11 votes


  5.0 from 11 votes
5 Star
4 Star
3 Star
2 Star
1 Star


in Idaho


192 Views Last Month
12,754 Since Sep 11, 2014
Intermediate/Difficult Intermediate/Difficult



Getting forecast...

Richard Croad
Portland, Or
Richard Croad   Portland, Or
the first 13 miles of this are super fun - a couple of tough climbs - but great downhill single track, especially the top half of dry creek. Loved it. Jun 13, 2016

MTB Project is part of the REI Co-op family,
where a life outdoors is a life well lived.

Shop REI Mountain Bike

MTB Project is supported by

Support Your Local IMBA Chapter